Bussmann Fustat Series Type S ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.19
Bussmann Fustat Series Type S Time-Delay Plug Fuse

Bussmann Fustat Series Type S Time-Delay Plug Fuse

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Model: S-25

In Stock (leaves warehouse same day if ordered before 3pm ET)

$14.19
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Bussmann Fustat Series Type S Time-Delay Plug Fuse

The Bussmann Fustat Series Type S Time-Delay Plug Fuse is a screw-in, threaded plug fuse designed as a direct-fit replacement for residential and light commercial fuse panels that accept Type S fuse holders. This family is available in amperage ratings from 3.2 Amp to 25 Amp, allowing installers and homeowners to match the exact rating required for a given branch circuit while standardizing on the trusted Fustat platform. Every fuse in this line carries a 10 kiloamp interrupt rating and features time-delay characteristics, helping it ride through normal motor-starting and appliance-inrush current spikes without nuisance blowing, while still opening quickly on sustained overloads or short circuits. Built with a threaded, screw-in base for tool-free installation, the Bussmann Fustat plug fuse is a straightforward, code-compliant option for maintaining properly rated overcurrent protection in legacy Type S fuse boxes.

Key Features

  • Amperage Rating Range: Available from 3.2 Amp to 25 Amp to precisely match branch circuit protection requirements.
  • Fustat Series: Part of Bussmann's Fustat plug fuse family, sized for Type S fuse sockets.
  • Time-Delay Operation: Time-delay design tolerates temporary inrush and motor-starting currents while still responding to sustained overloads.
  • Threaded, Screw-In Installation Category: Traditional plug-fuse base allows quick, tool-free installation and replacement in compatible fuse panels.
  • 10 kA Interrupt Rating: Rated to safely interrupt fault currents up to 10 kiloamps.
  • Compact Form Factor: Approximately .72 inches in width and 1.88 inches in height, sized to fit standard residential and light commercial fuse box sockets without modification.
  • Same-Rating Replacement: Matches the original amperage rating to help maintain proper circuit protection when swapping out a used or failed fuse.
  • Bussmann Build Quality: Manufactured by Bussmann, a long-established name in fuse and circuit protection products.

Technical Specifications

  • Installation Category: Threaded
  • Product Width: .72 inches
  • Product Height: 1.88 inches
  • Product Weight: .4 pounds
  • Interrupt Rating: 10 kiloamps
  • Product Details: Time Delay
  • Amperage Rating Options: 3.2 Amp, 25 Amp (select at checkout)

Typical Applications

  • Residential Fuse Panel Replacement
  • Light Commercial Fuse Box Protection
  • Branch Circuit Overcurrent Protection
  • Panelboard and Load Center Fuse Replacement
  • Legacy Fustat/Type S Fuse Panel Upgrades
  • Maintenance and Fuse Replacement Programs

Why Bussmann?

Bussmann is a widely recognized name in circuit protection, and the Fustat series carries that reputation forward with precisely rated, dependable time-delay plug fuses across its 3.2 Amp to 25 Amp range. Choosing a Bussmann Fustat fuse means installing a proven overcurrent protection device sized to match the demands of the panel it was designed to serve, backed by a 10 kiloamp interrupt rating and a durable threaded, screw-in construction. For facilities and homeowners maintaining older Fustat/Type S fuse panels, sourcing the correct Bussmann-branded replacement at the right amperage helps preserve the intended level of circuit protection.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Plug Fuse
Series:
Fustat
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Installation Category:
Threaded
Product Width:
.72 inches
Product Weight:
.4 pounds
Interrupt Rating:
10 kiloamps
Product Details:
Time Delay
Product Height:
1.88 inches
Configuration:
Time Delay
Standards:
Type S
Product Group:
Circuit Protection

Bussmann S-25 – Frequently Asked Questions

1) Will a Bussmann Fustat Type S fuse screw into my old fuse box?
Only if the socket is set up for Type S. The Fustat is a Type S plug fuse with a threaded screw-in base, so it goes into a Type S fuse holder (or the Edison-base socket once the matching Type S adapter is installed). A plain Edison-base socket with no adapter will not take it. Body size is .72 inches wide by 1.88 inches high, so it drops into standard residential and light commercial sockets without modification.
2) What amp ratings does the Bussmann Fustat plug fuse come in?
The Fustat family spans 3.2 amp to 25 amp. Two ratings are offered as orderable items: the 3.2 amp (MPN S-3-2/10) and the 25 amp (MPN S-25). Pick the rating that matches the circuit conductor the fuse protects, not the load, and match the rating of the fuse you are pulling out.
3) Why does my fuse keep blowing when the fridge or furnace motor starts?
That is inrush, and it is what the time-delay design of the Fustat is for. It tolerates the brief current surge of a motor start or appliance inrush without opening, while still clearing a sustained overload or a short. If a standard fast-acting plug fuse is nuisance-blowing on a motor circuit, a same-rated time-delay Type S fuse is the swap to make.
4) What fault current is the Bussmann Fustat rated to interrupt?
10 kiloamps. That interrupting rating has to equal or exceed the available fault current at the panel, which is why it matters on a service fed from a large utility transformer as much as on a house. Every rating in the Fustat line from 3.2 amp through 25 amp carries the same 10 kA rating, so mixed-rating panels stay consistent.
5) Do I need tools to change a Fustat plug fuse?
No tools. The threaded plug base turns in and out by hand, which is why plug fuses are still used in maintenance programs on legacy panels. Kill the main before you touch it, and replace with the same amperage rating.
6) Is the Bussmann Fustat suitable for light commercial panels or only houses?
Both. The Fustat Type S time-delay plug fuse is used for residential fuse panel replacement, light commercial fuse box protection, branch circuit overcurrent protection, and panelboard fuse replacement, with the same .72 by 1.88 inch body across the line. It is a maintenance item for legacy Type S fuse panels, not a new-construction breaker substitute.
How fast can I get the Bussmann S-25 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Bussmann S-25 come with a warranty?
Absolutely. The Bussmann S-25 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Bussmann S-25?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Bussmann S-25 from ZenSupply?
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